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-rw-r--r--src/string.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/string.c b/src/string.c
index 932362cad..9ef5b5fb4 100644
--- a/src/string.c
+++ b/src/string.c
@@ -2178,7 +2178,8 @@ mrb_str_len_to_inum(mrb_state *mrb, const char *str, size_t len, int base, int b
mrb_raise(mrb, E_ARGUMENT_ERROR, "string contains null byte");
/* not reached */
bad:
- mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid string for number(%S)", mrb_str_new_cstr(mrb, str));
+ mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid string for number(%S)",
+ mrb_inspect(mrb, mrb_str_new_cstr(mrb, str)));
/* not reached */
return mrb_fixnum_value(0);
}